fallback: translate: call llvm.convert.from.arbitrary.fp.bf16.i8
| Run: | main-04ca53e65f-20261014-113325 |
| Kind: | fallback |
| Category: | translate: call llvm.convert.from.arbitrary.fp.bf16.i8 |
| Occurrences: | 6 in 1 configs, 1 test files |
| Snippet from: | convert-from-arbitrary-fp.ll @fp8e5m2_to_bf16 via llvm-extract |
| Config: | -mtriple=riscv64 -mattr=+b,+f,+m |
| Local check: | reproduces at 04ca53e65f |
| Compiler Explorer: | not uploaded (over --godbolt-limit or disabled) |
Snippet:
; Function Attrs: nounwind
define bfloat @fp8e5m2_to_bf16(i8 signext %x) #0 {
%r = call bfloat @llvm.convert.from.arbitrary.fp.bf16.i8(i8 %x, metadata !"Float8E5M2")
ret bfloat %r
}
; Function Attrs: nocallback nocreateundeforpoison nofree nosync nounwind speculatable willreturn memory(none)
declare bfloat @llvm.convert.from.arbitrary.fp.bf16.i8(i8, metadata) #1
attributes #0 = { nounwind }
attributes #1 = { nocallback nocreateundeforpoison nofree nosync nounwind speculatable willreturn memory(none) }
Reproduce:
llc -mtriple=riscv64 -mattr=+b,+f,+m -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv64 -mattr=+b,+f,+m -global-isel=0 snippet.ll -o -
Local llc output:
remark: <unknown>:0:0: unable to translate instruction: call llvm.convert.from.arbitrary.fp.bf16.i8: ' %r = call bfloat @llvm.convert.from.arbitrary.fp.bf16.i8(i8 %x, metadata !"Float8E5M2")' (in function: fp8e5m2_to_bf16)
warning: Instruction selection used fallback path for fp8e5m2_to_bf16
Occurrences (6):
| Input | Function | Config |
|---|
| convert-from-arbitrary-fp.ll | fp8e5m2_to_bf16 | -mtriple=riscv64 -mattr=+b,+f,+m |
| convert-from-arbitrary-fp.37c5bc4ee6.ll (mutant of convert-from-arbitrary-fp.ll) | fp8e5m2_to_bf16 | -mtriple=riscv64 -mattr=+b,+f,+m |
| convert-from-arbitrary-fp.4f17a825b8.ll (mutant of convert-from-arbitrary-fp.ll) | fp8e5m2_to_bf16 | -mtriple=riscv64 -mattr=+b,+f,+m |
| convert-from-arbitrary-fp.74e89fb30f.ll (mutant of convert-from-arbitrary-fp.ll) | fp8e5m2_to_bf16 | -mtriple=riscv64 -mattr=+b,+f,+m |
| convert-from-arbitrary-fp.c4aacad91a.ll (mutant of convert-from-arbitrary-fp.ll) | fp8e5m2_to_bf16 | -mtriple=riscv64 -mattr=+b,+f,+m |
| convert-from-arbitrary-fp.cd5b8be086.ll (mutant of convert-from-arbitrary-fp.ll) | fp8e5m2_to_bf16 | -mtriple=riscv64 -mattr=+b,+f,+m |
Generated 2026-10-15 08:05 UTC.